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Test No. 11

  1. Leave CPU 20-pin connector attached. SeeFigure . Measure voltage at terminal 2R (Blue/White wire) of CPU 20-pin connector. With door key cylinder held in unlocked position, voltage should be zero. With door key cylinder in any other position, voltage should be 5 volts. If voltage is not as specified, go to step 3).
  2. If voltage is as specified, measure voltage at terminal 2L (Yellow/Black wire) of CPU 20-pin connector. With door key cylinder in locked position, voltage should be 2.5 volts. With door key cylinder held in unlocked position, voltage should be zero. With door key cylinder in any other position, voltage should be 5 volts. If voltage is not as specified, go to step 6). If voltage is as specified, replace CPU.
  3. Disconnect CPU 20-pin connector. With driver door key cylinder held in unlocked position, measure voltage at terminal 2R (Blue/White wire) of CPU 20-pin connector. If there is continuity, replace CPU.
  4. If there is no continuity, remove driver door trim panel. Disconnect door key cylinder switch connector. With door key cylinder held in unlocked position, check continuity between door key cylinder switch connector terminals. If there is no continuity, replace driver door key cylinder switch.
  5. If there is continuity, check continuity between ground and Black wire terminal of driver door key cylinder switch connector. If there is no continuity, repair wiring between ground and switch. If there is continuity, repair wiring between CPU and switch.
  6. Disconnect CPU 20-pin connector. With passenger door key cylinder held in unlocked position, measure voltage at terminal 2L (Yellow/Black wire) of CPU 20-pin connector. If there is continuity, replace CPU.
  7. If there is no continuity, remove passenger door trim panel. Disconnect door key cylinder switch connector. With door key cylinder held in unlocked position, check continuity between door key cylinder switch connector terminals. If there is no continuity, replace passenger door key cylinder switch.
  8. If there is continuity, check continuity between ground and Black wire terminal of passenger door key cylinder switch connector. If there is no continuity, repair wiring between ground and switch. If there is continuity, repair wiring between CPU and switch.
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